CVE-2021-28817

Name: CVE-2021-28817
Creator: NVD / NIST
Published: 2021-03-23T21:15:13.713+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.25%

Last modified Jun 17, 2026

CVE-2021-28817 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. The Windows Installation component of TIBCO Software Inc.'s TIBCO Rendezvous and TIBCO Rendezvous Developer Edition contains a vulnerability that theoretically allows a low privileged attacker with local access on some versions of the Windows operating system to insert malicious software. The affected component can be abused to execute the malicious software inserted by the attacker with the elevated privileges of the component. EPSS estimates a 0.25% chance of exploitation in the next 30 days.

Description

The Windows Installation component of TIBCO Software Inc.'s TIBCO Rendezvous and TIBCO Rendezvous Developer Edition contains a vulnerability that theoretically allows a low privileged attacker with local access on some versions of the Windows operating system to insert malicious software. The affected component can be abused to execute the malicious software inserted by the attacker with the elevated privileges of the component. This vulnerability results from a lack of access restrictions on certain files and/or folders in the installation. Affected releases are TIBCO Software Inc.'s TIBCO Rendezvous: versions 8.5.1 and below and TIBCO Rendezvous Developer Edition: versions 8.5.1 and below.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.25%

16.3th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Tibco	Rendezvous	<= 8.5.1

References

http://www.tibco.com/services/support/advisoriesVendor Advisory
http://www.tibco.com/services/support/advisoriesVendor Advisory

Timeline

Published: Mar 23, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-28817?

How severe is CVE-2021-28817?

CVE-2021-28817 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.25% probability of exploitation in the next 30 days.

How do I fix CVE-2021-28817?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-28817?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST